Just a quick update to let you know about some construction on the southern end of the McHenry County Prairie Trail, just north of where it connects to the Fox River Trail (in Algonquin).
This update and the photos are from my friend and fellow cyclist Dale Kiffel (I have not been on the Fox River Trail or Prairie Trail myself yet this year).
The main obstacles on this trail right now are where the trail crosses route 31 in Algonquin (there is some major construction going on there) and where they are building a new bridge about 3/4 of a mile north of the Algonquin Road overpass.
The first photo on this page is where they are building the new bridge. The trail is closed but, as you see by the determined cyclists in the photo, it is possible to get to the other side if you are determined.
The second photo in this post is the construction at Route 31 in Algonquin. It looks like it could be difficult to get through here too but there is also a cyclist getting through this section too.
So if you are planning a trip on the northern end of the Fox River Trail and connecting to the Prairie Trail to continue north (or planning a ride the other way on the trail) be aware that you may not be able to get through or there may be some tricky obstacles or detours that you will need to take.